Description: Achromatic Lenses are used to minimize or eliminate chromatic aberration. The achromatic design also helps minimize spherical aberrations. Achromatic Lenses are ideal for a range of ...

Goethe in his “Farbenlehre” says in a survey of the hisrory of achromatic lenses that the practical and theoretical work of Boscovich and Steiner will not be forgotten; but Steiner's has ...

Huygenian Huygens eyepieces are constructed of two plano-convex lenses with both plane sides facing the eye. Periplan Periplan eyepieces are constructed of one achromatic doublet and two plano-convex ...